title: Performance evaluation of MRI-based PAGAT polymer gel dosimeter in an inhomogeneous phantom using EGSnrc code on a Co-60 machine.
abstract: Relative isodose curves were obtained using PAGAT gel dosimeter on homogeneous and inhomogeneous phantoms. Distance-to-agreement (DTA) was calculated between simulated and measured values for both the homogeneous and inhomogeneous phantoms. All DTAs except one passed the acceptance criterion (+/-5 dose variation for selected isodose levels). Results of this study also showed the ability of the Monte Carlo modeling to provide accurate dosimetry, and revealed that the dose response of PAGAT polymer gel is dependent on the method of fabrication.
authors.affiliation: Department of Medical Physics and Biomedical Engineering, School of Medicine, Medical Sciences, University of Tehran, Tehran, Iran.
authors.forename: Tayyeb Allahverdi
authors.initials: TA
authors.lastname: Pourfallah
authors.forename: Mahmoud
authors.initials: M
authors.lastname: Allahverdi
authors.forename: Nader Riahi
authors.initials: NR
authors.lastname: Alam
authors.forename: Mohammad-Reza
authors.initials: MR
authors.lastname: Ay
authors.forename: Mohammad-Hasan
authors.initials: MH
authors.lastname: Zahmatkesh
authors.forename: Geoffrey S
authors.initials: GS
authors.lastname: Ibbott
mesh_terms: D003037:Cobalt Radioisotopes; D005373:Film Dosimetry; D005782:Gels; D009010:Monte Carlo Method; D019047:Phantoms, Imaging; D011108:Polymers; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods*
chemical_list: D003037:Cobalt Radioisotopes; D005782:Gels; D011108:Polymers